Expandable shelf



FIG. 1 is a perspective view of an expandable shelf, incorporating the new design.

FIG. 2 is a top plan of the expandable shelf of FIG. 1.

FIG. 3 is a bottom plan view of the expandable shelf of FIG. 1.

FIG. 4 is a right-side elevation of the expandable shelf of FIG. 1.

FIG. 5 is a left-side elevation of the expandable shelf of FIG. 1.

FIG. 6 is a front elevation of the expandable shelf of FIG. 1; and,

FIG. 7 is a rear elevation of the expandable shelf of FIG. 1. 

The ornamental design for an expandable shelf, as shown and described. 